Rust erasers promise to rub away the unsightly corrosion that can build up carbon-steel knives. We tested five models to see if any would be worth buying.
Carbon Steel Knife Care and Cleaning Knifewear - Handcrafted Japanese Kitchen Knives
Epicurean Edge: Japanese and European professional chefs knives
Package contents: you will receive 2 pieces of rust erasers, which are sufficient for you to use and replace in daily life, nice tools to bring
2 Pieces Rust Erasers Rubber Knife Surface Rust Spots Remover Dirt Stains Rust Erasers Cleaning Kitchen Tool for Carbon Steel Stainless Steel Surface
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Finally using a slightly neglected carbon knife, how to deal with rust instantly appearing when cutting onions : r/chefknives
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Syosaku Japanese Chef Knife Premium Molybdenum Stainless Steel, Gyuto 9.5-Inch (240mm)